Repetitive, small-bore two-stage light gas gun

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A repetitive two-stage light gas gun for high-speed pellet injection has been developed at Oak Ridge National Laboratory. In general, applications of the two-stage light gas gun have been limited to only single shots, with a finite time (at least minutes) needed for recovery and preparation for the next shot. The new device overcomes problems associated with repetitive operation, including rapidly evacuating the propellant gases, reloading the gun breech with a new projectile, returning the piston to its initial position, and refilling the first- and second-stage gas volumes to the appropriate pressure levels. In addition, some components are subjected to ... continued below

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Pages: (21 p)

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Combs, S.K.; Foust, C.R.; Fehling, D.T.; Gouge, M.J. & Milora, S.L. January 1, 1991.

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Description

A repetitive two-stage light gas gun for high-speed pellet injection has been developed at Oak Ridge National Laboratory. In general, applications of the two-stage light gas gun have been limited to only single shots, with a finite time (at least minutes) needed for recovery and preparation for the next shot. The new device overcomes problems associated with repetitive operation, including rapidly evacuating the propellant gases, reloading the gun breech with a new projectile, returning the piston to its initial position, and refilling the first- and second-stage gas volumes to the appropriate pressure levels. In addition, some components are subjected to and must survive severe operating conditions, which include rapid cycling to high pressures and temperatures (up to thousands of bars and thousands of kelvins) and significant mechanical shocks. Small plastic projectiles (4-mm nominal size) and helium gas have been used in the prototype device, which was equipped with a 1-m-long pump tube and a 1-m-long gun barrel, to demonstrate repetitive operation (up to 1 Hz) at relatively high pellet velocities (up to 3000 m/s). The equipment is described, and experimental results are presented. 124 refs., 6 figs., 5 tabs.

Physical Description

Pages: (21 p)

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OSTI; NTIS; INIS; GPO Dep.

Source

  • 42. Aeroballistic Range Association meeting, Adelaide (Australia), 21-25 Oct 1991

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  • Other: DE92001970
  • Report No.: CONF-9110244-1
  • Grant Number: AC05-84OR21400
  • Office of Scientific & Technical Information Report Number: 5124970
  • Archival Resource Key: ark:/67531/metadc1057046

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • January 1, 1991

Added to The UNT Digital Library

  • Jan. 22, 2018, 7:23 a.m.

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  • Feb. 1, 2018, 6:19 p.m.

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Combs, S.K.; Foust, C.R.; Fehling, D.T.; Gouge, M.J. & Milora, S.L. Repetitive, small-bore two-stage light gas gun, article, January 1, 1991; Tennessee. (digital.library.unt.edu/ark:/67531/metadc1057046/: accessed November 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.